/Engine/Source/Runtime/Engine/Classes/Animation/AnimInstance.h
Requests an inertial blend during the next anim graph update. Requires your anim graph to have a slot node belonging to the specified group name
void RequestSlotGroupInertialization ( [FName](API\Runtime\Core\UObject\FName) InSlotGroupName, float Duration, const [UBlendProfile](API\Runtime\Engine\Animation\UBlendProfile) * BlendProfile )